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Questions tagged [image-processing]

The tag has no usage guidance.

1
vote
1answer
42 views

How can I save a bmp (bitmap) image file at 16bpp?

I need to save an image as Windows Bitmap BMP A1R5G5B5 16bpp. Source files are 32bpp image files (PNG and/or Windows Bitmap). Preview saves bmp images at 32 bits per pixel (bpp). XnConvert saves bmp ...
2
votes
0answers
23 views

Image files saving as broken, Pasting Icons instead of the images

I have been having issues with how my computer is saving images and placing images. Whenever I save an image, it views fine on my computer, but shows up as broken anywhere else when I try to upload it ...
0
votes
3answers
103 views

Automator action “Rotate Images” is incredibly memory-intensive

I'm building an automator workflow to rotate images. It seems that sips and other image rotation possibilities do not actually change the bits of the image, but just flip a switch for orientation, and ...
0
votes
1answer
18 views

Recover obscured pixels

If I screenshot something on my phone and scribble out the text: Is it possible to get the text back? Are there computer programs that can analyse that jpg to see what’s under the scribble.
2
votes
1answer
30 views

Viewing large number of pictures over network storage

I am trying to view a large number of images from a NAS on a MacBook Air. So far I open the folder in Finder, select all the images, and double click on the first one. This opens the image and I can ...
3
votes
2answers
1k views

Where is the convert command in macOS?

I need to convert a PNG file to an EPS file. Various sources on the Web refer to the convert command on macOS, but that program does not appear to exist on macOS High Sierra. How do I get it?
0
votes
1answer
296 views

Convert multi-page PDF to single PNG

I have a multi-page PDF. I want to make a PNG which is just all of these pages appended. Preview.app's Export... > PNG option saves it as a ... multi-page PNG? I didn't know those were possible, but ...
8
votes
3answers
883 views

How can I obfuscate a small section of a image on macOS?

How can I obfuscate a small section of an image on macOS? I would like to obfuscate private information in an image before I share it. Is there a way to do it on macOS?
2
votes
2answers
129 views

Apple QuickTake™ 150 camera pictures in QuickDraw format…

Apple QuickTake 150 camera pictures in "QuickDraw picture" format cannot be opened by any software I have. At some point in the dark reaches of the past, I recall being able to Save As… but at the ...
2
votes
3answers
182 views

macOS: lossless PNG to PDF conversion

I have several pages imported from scanner in PNG format. I use image editor to clean some noise, downscale to 100PDI, convert image palette to grayscale, etc. Finally I've got a bunch of PNG images ...
1
vote
1answer
39 views

Breaking pdf to various images, compress, and recombine

I want to save each page of a PDF file as separate image, compress them, and recombine back as PDF. Some PDF files I often use are strangely large in size. I mean, some 100 pages but some 200M. I ...
0
votes
1answer
503 views

Native HEIF support in macOS 10.13 High Sierra?

I can't find any documentation regarding this. Will HEIF be a natively supported filetype in 10.13?
9
votes
3answers
3k views

What is the difference between millions and billions in printer/scanner colour settings?

The "Printers & Scanners" Setting preference pane has two color options: "millions" or "billions" of colors. I can't tell the difference. Is there a reason to choose one over the other? Perhaps ...
3
votes
1answer
95 views

imagemagick's convert jpeg to pdf rotates even pages 180°

When I use imagemagick's convert jpeg to pdf tool: convert *.jpeg output.pdf an output PDF is created, but what I've noticed is that the even pages get rotated by 180°. What's even stranger is that ...
3
votes
1answer
490 views

AppleScript: Get Image Location Data

I am trying to write an Automator Script which involves, among other things, getting the GPS location data from an image. This will be a Finder Service. From what I have been able to discover so far, ...
3
votes
1answer
59 views

Search file system for a similar image

Can anybody recommend a macOS application to search for images similar to a single candidate? I can find plenty of duplicate finders which search folders for duplicate or nearly duplicate images, but ...
0
votes
1answer
402 views

Can I use SIPS to reduce the size of PNG files by reducing the number of palette colors?

I need to shrink PNG files like the ones generated as the default macOS screenshot. SIPS was my first stop since it's faster than any other solution but I haven't quite been able to find the right ...
1
vote
0answers
106 views

How to create an image to GIF converter usable from the finder?

I would like to be able to quickly convert images to GIF as it can compress line art images much more than PNG or JPEG. The fastest way to convert is an Automator Service, and Automator does indeed ...
0
votes
1answer
39 views

Geotagging with Photos or other app

I've got ~100GB of photos that I've imported into Photos. Photos stayed in place because they are in date related subfolders. I would stay with original sorting as it is more usable with other photo ...
3
votes
1answer
3k views

Why does Image Magick fail to read fonts?

I'm trying to create a simple contact sheet of all the photos in a directory using Montage: $ montage -font Helvetica -pointsize 10 *.png contact_sheet.jpg However, I keep getting a error reading ...
0
votes
1answer
282 views

Can this model of MacBook Pro satisfy my scientific needs?

I've recently decided to buy a 13-inch MacBook Pro. Although this costs me a lot, first-time experiencing this machine could be very interesting for me. Its weight is the other reason that attracts me....
5
votes
1answer
2k views

To install Shotwell in OSX

I install the first dependencies of Shotwell successfully brew install libGphoto2 vala libgee Some discussion about this issue in this thread but the accepted answer is misleading, since it is ...
13
votes
2answers
23k views

To install Brew's ImageMagick and fix its Symlink

Assume you installed Imagemagick by brew install imagemagick but it does not get into your PATH. For example, I run unsuccessfully compare since imagemagick is not in PATH: -bash: compare: ...
2
votes
1answer
1k views

App or tool for auto-crop receipt-like pictures?

I've bunch of scan of receipts, the one that are printed on thermal paper which you get from any supermarkets and these were taken on the dark background. I'd like to auto-crop them in batch via some ...
3
votes
1answer
1k views

Filtering a photo of a document to look like a proper scan

So there are a couple of iOS apps that "scan" documents and automatically do some processing to make the image look like a quality scan from a real scanner. When I'm trying this on the Mac with ...
0
votes
1answer
211 views

Robust OCR / scanning software recommendations

Ideally I would like smart batch capabilities, emphasis on image correction and tweakable OCR. An example use case: I have photos of textbook pages - the most ideal application ever would adjust for ...
0
votes
1answer
218 views

Bug with the automator action “rotate an image” and tags

I have the following bug. I have created a small app that rotates an image, with the help of automator. But when I apply this action to a file with tags, it removes all the tags of the file (by tag, ...
2
votes
2answers
1k views

Can I get Mavericks QuickLook to display Finder images scaled up to full screen like before?

In Lion if I used QuickLook to display an image, and then clicked the double arrows to make it full screen, it would scale the image to the size of my monitor (up too, not just down). Then when I used ...
1
vote
1answer
815 views

OS X program to view .xif file

I have some old .xif image files from a scanning application (Pagis / Scansoft) that I'd like to view/ convert to PDF. Tried all kinds of viewers - Preview, Xee, Adobe (including Photoshop) with no ...
2
votes
4answers
5k views

Reducing the size of a black-and-white scanned pdf

I have a 352 page pdf that is a scan of a black-and-white text. The file size is 60.9 MB, which seems excessively large too me. (Is it indeed?) Is there an easy way to convert this file to a more ...
7
votes
2answers
1k views

How can I process/read checkmarks on a paper form?

I would like to process a large number of scanned paper forms (GUI or command line). I am only interested in reading (custom) checkboxes. The form looks like this: every line has 6 circle-shaped ...
12
votes
5answers
45k views

Is it possible to upload files to a website from Safari on iPhone?

I'm trying to upload a photo from my iPhone 4 to a website. However, the browse button to display the select file dialog is disabled. Normally this works fine on my Windows PC. Should I be able to ...